Exploding targets, not bullets caused four fires that have burned up hundreds of acres of rangeland in Idaho so far this year.
Four of the 19 human-caused fires in southwest Idaho this year were caused by the exploding targets that have become popular among target shooters. Two wildfires near Kuna on Sunday burned about 800 acres, and a third exploding target fire Monday burned 370 acres south of Marsing.
When hit by high velocity bullets these chemical incendiary targets explode, sending off burning material that ignites surrounding grass.
The exploding targets are specifically outlawed on public lands during fire season by the annual fire prevention order issued by the Bureau of Land Management. This is the same one that prohibits the use of fireworks and tracer ammunition on public lands.
Here is a video that explains the targets. (Note right at the beginning during the first explosion before the guy starts talking the fire starting on the left.)